[M] Change in coreboot[master]: soc/amd: Use common reset code for PCO, CZN, MDN, PHX & Glinda

[Felix Held (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Martin L Roth, Matt DeVillier, Fred Reitberger.

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/72659 )

Change subject: soc/amd: Use common reset code for PCO, CZN, MDN, PHX & Glinda
......................................................................

Patch Set 2:

(1 comment)

Patchset:

PS2: 
i'd split this patch into two halves: one for picasso, cezanne and mendocino that doesn't change behavior and one for phenix and glinda that changes behavior. or have one patch change to use the common code and another one to change behavior on phoenix and glinda. mixing cleanups/code improvements with functional changes in one patch makes the very unlikely case of the need for a revert more difficult. apart from that, i like the patch